The New York City Department of Health issued an alert urging the celebrity guests attended Ashton Kutcher's birthday party at West Village hotspot Socialista on Feb 7 to get a Hepatitis A shot.

Photo credit: David Gabber/PR Photos

Ashton Kutcher's birthday bash turned into a nightmare. Fellow Hollywood celebrities who attended the hunk's birthday bash held at West Village hot spot Socialista back on February 7 have all been urged to get a Hepatitis A vaccination after a bartender was found to be infected.

The New York City Department of Health issued an alert Thursday, February 21, urging the A-list stars attended Ashton's 30th birthday party at the hot spot and everyone who was there on certain nights to get vaccinated as a precaution. The alert was issued because, according to the agency, a bartender who was working at Socialista in between Feb. 7, as well as Feb. 8 and 11, was infected with the disease.

In the meantime, Socialista's owners estimated that there were nearly 800 people got their drink-and-dance there during the three nights the bartender in question worked there.

There was no immediate comment from representative for both Ashton and Demi concerning the Hepatitis A encounter. Socialista, elsewhere, has issued a statement, saying "Although no additional cases of illness have been identified, the New York City Department of Health is urging customers to get the vaccination as a precautionary measure. We are grateful for their efforts, and we will continue to support them in every way possible."

Hepatitis A is an acute infectious disease of the liver caused by Hepatitis A virus which is most commonly transmitted by the faecal-oral contact via contaminated food or drinking water.